What’s Vulnerable › Vulnerabilities
CVE-2024-36477: tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer
- Severity: high (CVSS 7.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2024-06-21 · updated 2026-08-04
- Weakness: CWE-125
Description
In the Linux kernel, the following vulnerability has been resolved: tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer The TPM SPI transfer mechanism uses MAX_SPI_FRAMESIZE for computing the maximum transfer length and the size of the transfer buffer. As such, it does not account for the 4 bytes of header that prepends the SPI data frame. This can result in out-of-bounds accesses and was confirmed with KASAN. Introduce SPI_HDRSIZE to account for the header and use to allocate the transfer buffer.
Affected products
- Linux kernel: from 6.6 (excl.) before 6.6.33; from 6.7 (excl.) before 6.9.4; 6.10-rc1 — fixed in 6.6.33, 6.9.4
How to fix
Upgrade to a fixed version: Linux kernel 6.6.33, 6.9.4. Check the vendor advisory for mitigations.
References
- https://git.kernel.org/stable/c/1547183852dcdfcc25878db7dd3620509217b0cd
- https://git.kernel.org/stable/c/195aba96b854dd664768f382cd1db375d8181f88
- https://git.kernel.org/stable/c/de13c56f99477b56980c7e00b09c776d16b7563d
- https://git.kernel.org/stable/c/1547183852dcdfcc25878db7dd3620509217b0cd
- https://git.kernel.org/stable/c/195aba96b854dd664768f382cd1db375d8181f88
- https://git.kernel.org/stable/c/de13c56f99477b56980c7e00b09c776d16b7563d
Get alerted when CVE-2024-36477 or the next vulnerability affects your stack